Almost 18 yrs old male going to be bald

[Renevnng]

Hi, im really concerned about my hair. My teacher told me that I'm going to be bald - he just took a look on "the corners" of my hair.

Well tbh I dont know what to do. Should I be worried or get a doctor to make a statement to make it official - i dont know if i can prevent being bald. It makes me really sad because of my age. It gives me anxiety and whats worse - Im really into fashion and this is like literally my death.

Can you guys, please, tell me the truth, your opinions (except: dont worry about it, life has much more to offer)? Even if its bad. It may be a mature hairline and it can just stay as it is like now.

Please, excuse my english. Im not a native speaker